Q: what causes a P0174 bank2 combustion too lean

asked by on

I have a 2000 ford explorer 4.0 sohc and here lately when driving sumtimes outta nowhere itll just lose speed and the rpms drop,doesnt wanna go anywhere it seems..until i pull over n rurn truck off then on again and its ok for a little bit then will do it again. I took it to autozone to have the codes pulled cause yes my check enginelight is on and they got the code P0174-bank 2 conbcombustion is too lean. I changed the bank 2 oxygen censor and cleaned my MAF censor and it still does it. What else could it be??

My car has 164000 miles.

You will need to have the system inspected thoroughly to see why the vehicle is going lean. The possible causes are that you are loosing fuel pressure or fuel volume. If fuel pressure gets too low it will cause the loss of power and the fuel filter may cause the loss of fuel volume if it is clogged.

The O2 sensor is just letting you know that it detected a lean condition and there are several tests that would need to be done to isolate the problem. You may have an injector on bank two going bad or have a computer going bad.

All of these possibilities would need proper diagnosis to isolate the problem. I’d recommend getting some help from a professional mechanic who can diagnose your Check Engine Light and make the necessary repairs to get your car running normally again.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. what causes a P0174 bank2 combustion too lean

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My problem is Check Engine Light on. Cruise control does not work, loses power on hills, as if it does not want to pull hill.

Hi there. From the description you have provided, there is several possibilities for your vehicle's drivability problems. Your vehicle's Check Engine Light may help diagnose the lack of power and inoperative cruise control. Accessing the vehicle's computer for codes stored,...

Q: Code 1349 P

Hey there. Try having the compression checked for each cylinder. I have had experiences where this code pops up due to a lack of compression from a burned exhaust valve. Also, are you using the right fuel? Using inferior fuel...

Q: My timing belt broke and we retimed and replaced the belt. And it will crank and idle but when u put it in drive it won't go

If there was no loss of power prior to this incident, a possibility is the new timing belt is mispositioned. You can check for that indirectly by measuring intake vacuum at idle. If intake vacuum is below the low end...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...